Advanced Formatting: Float, Round, and Percent
Within a simple {} block, we can round a float number with the necessary precision, or represent a number as a percent.
Let's consider the pattern we will use in this chapter:
{:[thousands separator].[number][type]}
Please note, that like in the previous chapters, we don't need to place square brackets (I placed it for convenience).
[thousands separator]- the symbol used to separate every thousand (possible values are,and_).[number]- is the precision, number of decimal places (used for rounding number).[type]- type of number representing (e- scientific notation,%- percentage (will multiply number by 100),g- general format,f- fixed-point notation). You can dive deeper into possible options in Python documentation.
123print("Original number: {0}, formatted number: {0:.2f}".format(255/8)) print("Original number: {0}, formatted number: {0:.2%}".format(15/48)) print("Original number: {0}, formatted number: {0:,.2f}".format(35*6327))
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As of 2020, the population of the USA was 331002651. The total land area is 9147420 sq.km. Population density is the population-to-area ratio. Your tasks are:
- Format the first string so the population and area will be printed in format:
9,147,420, and insert variables in the correct order. - Within the second
.formatfunction calculate the population density and format the number in format28.45.
Lösning
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Within a simple {} block, we can round a float number with the necessary precision, or represent a number as a percent.
Let's consider the pattern we will use in this chapter:
{:[thousands separator].[number][type]}
Please note, that like in the previous chapters, we don't need to place square brackets (I placed it for convenience).
[thousands separator]- the symbol used to separate every thousand (possible values are,and_).[number]- is the precision, number of decimal places (used for rounding number).[type]- type of number representing (e- scientific notation,%- percentage (will multiply number by 100),g- general format,f- fixed-point notation). You can dive deeper into possible options in Python documentation.
123print("Original number: {0}, formatted number: {0:.2f}".format(255/8)) print("Original number: {0}, formatted number: {0:.2%}".format(15/48)) print("Original number: {0}, formatted number: {0:,.2f}".format(35*6327))
Swipe to start coding
As of 2020, the population of the USA was 331002651. The total land area is 9147420 sq.km. Population density is the population-to-area ratio. Your tasks are:
- Format the first string so the population and area will be printed in format:
9,147,420, and insert variables in the correct order. - Within the second
.formatfunction calculate the population density and format the number in format28.45.
Lösning
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Completion rate improved to 4.35single
